Resistors and Resistor Color Code -
A quick look at resistors and resistor color codes with pictures and charts.
Capacitors and Inductors -
Increase your knowledge of capacitors and inductors with these simple explanations.
Simple power supplies like this are sometimes called battery eliminators when they are made to output a particular voltage, 9 volts for example. If they are made adjustable, then a wide range of useful voltages can be produced from one simple power supply.
This basic electronics circuit is actually a very low frequency square wave oscillator. The frequency of the square wave output determines the flash rate of the light emiting diodes. You see similar circuits in use by cities and highway departments as flashing warning lights.
This is an interesting combination of two basic electronic ciruits, an oscillator operating in the audio frequency range and an audio amplifier that allows a speaker to be connected to the oscillator. By using the amplifier to amplify the output of the oscillator, you can obtain a loud sound that can be used for an alarm or anything else that requires a loud audio tone.
Zener diodes are an interesting type of diode. They conduct in the forward biased direction just like ordinary diodes but it's the reverse biased condition that's interesting because the voltage drop across the diode in the reversed direction is constant making them a good voltage regulator.
This is an easy to do one evening project.
Zener diodes are used as voltage regulators and will begin to conduct in the reverse or "breakdown" mode when enough voltage is applied. This voltage will remain constant or "regulated". To use this tester, supply enough voltage from a battery or power supply that will cause the highest voltage zener you might have to operate. If you might have some 24 or 48 volt types then you need that voltage as a minimum. I use 12 volts on mine since most of the diodes I use operate below that voltage. Next turn the pot all the way down (zero volts). Attatch the diode and begin to increase the voltage. Watch the meter and when it stops going any higher you have reached the "zener point" for that diode. Now, just read the voltage on the meter and mark the diode. If the meter does not read as you increase voltage, try reversing the diode. If that dosent work you have a shorted diode or it's not a zener diode.
NEW Video Concerning Nikola Tesla And The Tesla Effect (3:40) A special website with Little Known Tesla Information Find out what we now know about the old weird scientist himself.
Learning more about electronics is made easy and fun with my new inexpensive basic electronics home course. Not only will you find out more about capacitors and inductors, but also resistors, then alternating current which leads you to transformers. Next comes impeadance and then semiconductors, transistors, diodes and more. Sounds complicated? It's NOT! I make sure it's both easy and simple to understand. The last part includes basic electronic projects, where you use what you learned by building simple circuits. Basic Electronics Course
Find out for yourself how simple and easy I have made it for you to learn basic electronics. Learn Basic Electronics And Basic Electronic Circuits At Home Three Hard To Find Electronic Testing And Repair Books By Electronics Expert J. Yong Click on the covers for more information on these electronic repair books by Justine Yong.
The Sun’s Energy Is The Most Abundant FREE |
Often you can find a great bargin at a surplus store or at a flea market
on un-marked zener diodes. This device here will not only test for
good diodes but will tell you the zener voltage of that diode.
Off The Subject But Interesting...
Get the free reports here
Greg's Basic Electronics Learn Basic Electronics The Easy Way
Privacy
Terms & Copyright
© COPYRIGHT 2004-2010 ALL RIGHTS RESERVED
By GregsBasicElectronics.com
GregsBasicElectronics.com